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Right ventricular ejection fraction measurements using two-dimensional transthoracic echocardiography by applying an ellipsoid model
Örebro University, School of Medical Sciences. Orebro University Hospital. Faculty of Medicine and Health, Örebro University Biomedical Engineering, Örebro University Hospital, Örebro, Sweden.
Orebro University Hospital. Örebro University, School of Medical Sciences. Faculty of Medicine and Health and Department of Clinical Physiology, Faculty of Medicine and Health, Örebro University, Örebro, Sweden.ORCID iD: 0000-0002-4262-6373
Örebro University, School of Medical Sciences. Orebro University Hospital. Faculty of Medicine and Health and Department of Radiology, Faculty of Medicine and Health, Örebro University, Örebro, Sweden.
Örebro University, School of Medical Sciences. Orebro University Hospital. Faculty of Medicine and Health and Department of Medical Physics, Department of Medical Physics, Faculty of Medicine and Health, Örebro University, Örebro, Sweden.ORCID iD: 0000-0002-8351-3367
2017 (English)In: Cardiovascular Ultrasound, ISSN 1476-7120, E-ISSN 1476-7120, Vol. 15, 4Article in journal (Refereed) Published
Abstract [en]

Background: There is today no established approach to estimate right ventricular ejection fraction (RVEF) using 2D transthoracic echocardiography (TTE). The aim of this study was to evaluate a new method for RVEF calculations using 2D TTE and compare the results with cardiac magnetic resonance (CMR) imaging and tricuspid annular plane systolic excursion (TAPSE).

Methods: A total of 37 subjects, 25 retrospectively included patients and twelve healthy volunteers, were included to give a wide range of RVEF. The right ventricle (RV) was modeled as a part of an ellipsoid enabling calculation of the RV volume by combining three distance measurements. RVEF calculated according to the model, RVEFTTE, were compared with reference CMR-derived RVEF, RVEFCMR. Further, TAPSE was measured in the TTE images and the correlations were calculated between RVEFTTE, TAPSE and RVEFCMR.

Results: The mean values were RVEFCMR = 43 +/- 12% (range 20-66%) and RVEFTTE = 50 +/- 9% (range 34-65%). There was a high correlation (r = 0.80, p < 0.001) between RVEFTTE and RVEFCMR. Bland-Altman analysis showed a mean difference between RVEFCMR and RVEFTTE of 6 percentage points (ppt) with limits of agreement from -11 to 23 ppt. The mean value for TAPSE was 19 +/- 5 mm and the correlation between TAPSE and RVEFCMR was moderate (r = 0.54, p < 0.001). The correlation between RVEFTTE and RVEFCMR was significantly higher (p < 0.05) than the correlation between TAPSE and RVEFCMR.

Conclusions: The ellipsoid model shows promise for RVEF calculations using 2D TTE for a wide range of RVEF, providing RVEF estimates that were significantly better correlated to RVEF obtained from CMR compared to TAPSE.

Place, publisher, year, edition, pages
BioMed Central, 2017. Vol. 15, 4
Keyword [en]
Right ventricle, Right ventricular function, Echocardiography, Cardiac magnetic resonance imaging
National Category
Cardiac and Cardiovascular Systems
Research subject
Cardiology
Identifiers
URN: urn:nbn:se:oru:diva-57065DOI: 10.1186/s12947-017-0096-5ISI: 000396781100001PubMedID: 28270161Scopus ID: 2-s2.0-85014670050OAI: oai:DiVA.org:oru-57065DiVA: diva2:1088991
Note

Funding Agency:

Research Committee of Region Orebro County  OLL-573211

Available from: 2017-04-18 Created: 2017-04-18 Last updated: 2017-05-15Bibliographically approved

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Jorstig, StinaWaldenborg, MikaelLidén, MatsThunberg, Per
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